What is VOPO in tennis betting?

VOPO (Value Over Pinnacle Odds) is the difference between Tennis Glicko's internal win probability (average of Glicko-2 and Elo models) and the implied probability from Pinnacle's odds. A positive VOPO means the market is undervaluing a player.

What is Green EV in tennis betting?

Green EV is Tennis Glicko's high-conviction value signal. It triggers when VOPO exceeds 12% AND the internal win probability is above 50% — indicating the market is significantly mispricing a player.

How accurate is Tennis Glicko?

Tennis Glicko has 72.8% predictive accuracy over the last 30 days, with a Brier Score of 0.1775 — a standard probabilistic calibration metric used in forecasting.

Why use Glicko-2 instead of ATP rankings for tennis predictions?

ATP rankings are a lagging indicator — they ignore surface specialization, injury returns, scheduling fatigue, and form swings. Glicko-2 updates after every match, adjusts for opponent quality, and models rating uncertainty, making it significantly more accurate for predicting match outcomes.

Rankings

Sonay Kartal

WTA84d inactive

Glicko-22.047

#27 overall·RD 69

Elo2.096#27 overall

Recent Form

60% Win Rate

Hard

Glicko-22.037#23

Elo1.952#24

Clay

Glicko-21.776#300

Elo1.649#344

Grass

Glicko-21.726#33

Elo1.662#18

Recent Matches

Elena Rybakina

BNP Paribas Open - Indian Wells

2026-03-11Hard6-4 4-3 ret.

Madison Keys

BNP Paribas Open - Indian Wells

2026-03-09Hard2-6 6-2 6-3

Emma Navarro

BNP Paribas Open - Indian Wells

2026-03-07Hard6-1 3-6 7-6(2)

Lanlana Tararudee

BNP Paribas Open - Indian Wells

2026-03-05Hard6-4 6-4

Aliaksandra Sasnovich

Dubai Duty Free Championships - Dubai

2026-02-14Hard6-4 6-3

Storm Hunter

Dubai Duty Free Championships - Dubai

2026-02-13Hard6-4 6-1

Magda Linette

Qatar TotalEnergies Open - Doha

2026-02-08Hard6-4 3-6 6-3

Kimberly Birrell

Qatar TotalEnergies Open - Doha

2026-02-07Hard7-5 6-3

Simona Waltert

Qatar TotalEnergies Open - Doha

2026-02-06Hard7-5 2-6 6-4

Sara Bejlek